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kubernetes_installation

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    kubernetes_installation 2.65 KiB
    # Installation et Configuration d'un Cluster Kubernetes sous Debian 12
    
    ## 1. Prérequis
    
    - **OS** : Debian 12
    - **Réseau** : 192.168.10.0/24
    - **Infrastructure** : 3 VMs (1 Master, 2 Workers)
    
    | Nom      | Rôle    | Adresse IP       |
    |----------|--------|-----------------|
    | kube01   | Master | 192.168.10.10    |
    | worker1  | Worker | 192.168.10.11    |
    | worker2  | Worker | 192.168.10.12    |
    
    - Configuration de **/etc/hosts** sur chaque machine :
    
        ```bash
        127.0.0.1       localhost
        127.0.1.1       kube01
        192.168.10.11   worker1
        192.168.10.10   kube01
        192.168.10.12   worker2
        ```
    
    ## 2. Installation de Docker
    
    Sur **chaque machine**, exécutez :
    
    ```bash
    curl https://get.docker.com | bash
    ```
    
    ## 3. Désactivation du Swap
    
    ```bash
    swapoff -a
    sed -i '/ swap / s/^/#/' /etc/fstab
    ```
    
    Vérification :
    
    ```bash
    free -h
    ```
    
    ## 4. Configuration Système pour Kubernetes
    
    Sur **toutes les machines**, exécutez :
    
    ```bash
    cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf 
    overlay
    br_netfilter
    EOF
    
    modprobe overlay 
    modprobe br_netfilter
    
    cat <<EOF | tee /etc/sysctl.d/99-kubernetes-k8s.conf
    net.bridge.bridge-nf-call-iptables = 1
    net.ipv4.ip_forward = 1 
    net.bridge.bridge-nf-call-ip6tables = 1 
    EOF
    
    sysctl --system
    ```
    
    ## 5. Installation de Containerd
    
    ```bash
    apt -y install containerd
    containerd config default | tee /etc/containerd/config.toml >/dev/null 2>&1
    ```
    
    ## 6. Installation de Kubernetes (Kubeadm, Kubelet, Kubectl)
    
    ```bash
    curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
    echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] http://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
    apt update
    apt -y install kubeadm kubelet kubectl
    ln -s /opt/cni/bin /usr/lib/cni
    ```
    
    ## 7. Initialisation du Cluster Kubernetes
    
    Sur **le master (kube01)** :
    
    ```bash
    kubeadm init --control-plane-endpoint=192.168.10.10 --pod-network-cidr=10.244.0.0/16
    ```
    
    Post-initialisation :
    
    ```bash
    mkdir -p $HOME/.kube
    cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    chown $(id -u):$(id -g) $HOME/.kube/config
    ```
    
    Si root :
    
    ```bash
    export KUBECONFIG=/etc/kubernetes/admin.conf
    ```
    
    ## 8. Ajout des Workers
    
    Sur **chaque worker** :
    
    ```bash
    kubeadm join 192.168.10.10:6443 --token <TOKEN> \
        --discovery-token-ca-cert-hash sha256:<HASH>
    ```
    
    Vérification :
    
    ```bash
    kubectl get nodes
    ```
    
    ## 9. Installation du réseau des Pods
    
    ```bash
    kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
    ```